BuiltWith Technology Profiler is a free Developer Tools plugin offered by https://builtwith.com for Chrome users. It can be used to recognize the technologies implied behind a website. You can download the latest and older CRX versions of this free Chrome extension from this article.
About BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
The BuiltWith Chrome Extension lets you find out what a website is built with by a simple click on the BuiltWith icon!
BuiltWith is a website profiler tool. Upon looking up a page, BuiltWith returns all the technologies it can find on the page.